diff -urN ucblogo-5.1/globals.h ucblogo-5.1.patch/globals.h
--- ucblogo-5.1/globals.h	Mon Jul 16 23:30:28 2001
+++ ucblogo-5.1.patch/globals.h	Sun Aug 19 20:00:10 2001
@@ -19,6 +19,9 @@
  *
  */
 
+#define SIG_TAKES_ARG
+#define SIGRET
+
 /* main.c */
 extern NODE **bottom_stack; /*GC*/
 extern NODE *current_line, *exec_list;